ℱ
Unicode
U+2131LaTeX
\mathcal{F}HTML entity
HTML decimal
ℱMathML
<mi>ℱ</mi>Semantic identity and intent
Characters to distinguish
- ⃗ — Combining Vector Arrow
- ℂ — Complex Numbers
- ℍ — Quaternions
Use ℱ in the right format
Meaning and usage
Often denotes a Fourier transform, family, or sigma-algebra.
Define the object because script F has multiple conventions.
Pronunciation: script f
Formula examples
\mathcal{F}\{f\}How to type Script F
- Windows
- Open Character Map and search by name or Unicode U+2131.
- macOS
- Open Character Viewer with Control–Command–Space and search by the symbol name.
- Microsoft Word
- In an equation, type \mathcal{F} and press Space when Word supports the command.
- iPhone and iPad
- Copy and paste ℱ, or use a math/LaTeX app. The standard iOS keyboard may not expose every mathematical symbol.
- Android
- Copy and paste ℱ, or use a math keyboard or LaTeX editor. Keyboard layouts vary by device and app.
- Google Docs
- For plain text, paste ℱ or use Insert → Special characters. For structured math, use the equation editor and verify \mathcal{F}.
- Excel
- Paste ℱ into a cell or use Insert → Symbol when available. Ordinary cells preserve the character but do not interpret LaTeX commands.
Common mistakes
- Do not substitute a visually similar Latin or differently styled character for ℱ; case and mathematical alphabet style can identify different quantities.
- For plain text, copy ℱ as U+2131; for structured equations, use \mathcal{F} in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Script F.
When to use ℱ
- Use ℱ in plain text when a Unicode character is appropriate and the destination preserves U+2131.
- Use \mathcal{F} in an equation editor when mathematical spacing or structure matters.
- Define the local meaning when Script F is used in math alphanumeric with a field-specific convention.
Look-alikes and related characters
- ⃗ — Combining Vector Arrow
- ℂ — Complex Numbers
- ℍ — Quaternions
Font and compatibility notes
Font coverage varies; verify the code point and destination rendering before publication.
Continue the workflow
From Script F to a finished equation
- Copy the characterUse ℱ in plain text when Unicode is accepted.
- Choose a structured formatUse
\mathcal{F}for LaTeX or the MathML snippet for accessible web equations. - Edit or convertOpen the value in the editor or converter without retyping it.
Review and source notes
Quality tier: catalog
Last reviewed: 2026-07-23
Review method: Catalog review of character identity and notation mappings.
Verified against: Unicode Standard, Unicode mathematical notation guidance, and established LaTeX/MathML syntax.
Reference sources
- The Unicode StandardUnicode Consortium — Character identity, encoding, names, and conformance.
- Unicode Character Code ChartsUnicode Consortium — Code points and official character charts.
Frequently asked questions
What does the Script F symbol mean?
Often denotes a Fourier transform, family, or sigma-algebra.
What is the LaTeX command for ℱ?
Use \mathcal{F} in a compatible math environment.
Can I copy ℱ as Unicode?
Yes. Use the copy button above to copy the Unicode character directly.